Display device having anti-fog transparent protection plate

ABSTRACT

An exemplary display device ( 10 ) includes a display module ( 11 ), a frame ( 12 ), a porous ceramic member ( 13 ), and a transparent protection plate ( 14 ). The frame defines a receiving cavity ( 121 ). The display module is confined in the receiving cavity of the frame. The transparent protection plate is configured in front of the light output side of the display module. The porous ceramic member is located between the front surface ( 122 ) of the frame and the transparent protection plate. The display device can prevent fogs forming on the transparent protection plate for maintaining a clear display.

CROSS-REFERENCE TO RELATED APPLICATIONS

This application is related to two co-pending U.S. patent applications, a co-pending U.S. patent application Ser. No. 11/741,748, filed on Apr. 29, 2007, and entitled “DISPLAY DEVICE HAVING ANTI-FOG TRANSPARENT PROTECTION PLATE”, and a co-pending U.S. patent application Ser. No. 11/746,646, filed on May 10, 2007, and entitled “DISPLAY DEVICE HAVING ANTI-FOG TRANSPARENT PROTECTION PLATE” wherein the inventor is Lone-Wen Tai et al. All of such applications have the same assignee as the present application.

BACKGROUND OF THE INVENTION

1. Field of the Invention

The present invention generally relates to a display device, and more particularly to a flat-panel display device having an anti-fog transparent protection plate.

2. Discussion of the Related Art

Recently, there has been an increased demand for flat-panel display devices for use in, electronic products such as personal digital assistants, mobile phones, portable computers, televisions, etc. This is because the flat-panel display devices have a thinner structure or configuration in contrast to cathode ray tube display devices. Generally, the flat-panel display device may be a liquid crystal display device, a plasma display device, a field emission display device, an electroluminescent display device, etc. In particularly, the liquid crystal display device is typically used to represent the flat-panel display device, because the liquid crystal display devices currently have the largest market and the fastest development speed.

In a liquid crystal display device, a screen of the liquid crystal display device should be cleaned to see a clear display. Generally, the screen of the liquid crystal display is made of a delicate material that is easily scratched when cleaned and/or scratched upon with a rough object.

In order to prevent the screen from being scratched, a sturdy transparent plate is generally configured on a frame of the liquid crystal display device to protect the screen. The screen of the liquid crystal display device and the rigid transparent plate are spaced apart from one another, therefore an interspace is defined between the screen and the rigid transparent plate. To avoid fogs generated on the rigid transparent plate when water vapors in the interspace comes in contact with the rigid transparent plate with a cooler temperature relative to the screen, some holes that regulate ventilation between the interspace and ambient environment is needed. Generally, dust particles would enter the interspace through the holes, and thus the screen of the liquid crystal display device would be contaminated.

Therefore, a new display device is desired in order to overcome the above-described shortcomings.

SUMMARY

A display device includes a frame, a display module, a transparent protection plate, and a porous ceramic member. The frame defines a receiving cavity. The display module is received in the receiving cavity of the frame. The transparent protection plate is configured on the light output side of the display module. The porous ceramic member is located at an edge between the display module and the transparent protection plate.

Other novel features and advantages will become more apparent from the following detailed description, when taken in conjunction with the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

The components in the drawings are not necessarily drawn to scale, the emphasis instead being placed upon clearly illustrating principles of the present display device. Moreover, in the drawings, like reference numerals designate corresponding parts throughout several views, and all the views are schematic.

FIG. 1 is an exploded view of a display device in accordance with a first preferred embodiment of the present invention.

FIG. 2 is an assembled, side, cross-sectional view of the display device of FIG. 1.

FIG. 3 is a side, cross-sectional view of a display device in accordance with a second preferred embodiment of the present invention.

FIG. 4 is a side, cross-sectional view of a display device in accordance with a third preferred embodiment of the present invention.

FIG. 5 is an exploded view of a display device in accordance with a fourth preferred embodiment of the present invention.

DETAILED DESCRIPTION OF THE EMBODIMENTS

Reference will now be made to the drawings to describe preferred embodiments of the present display device in detail.

Referring to FIGS. 1 and 2, a display device 10 according to a first embodiment is shown. The display device 10 includes a liquid crystal display module 11, a frame 12, a porous ceramic member 13, and a transparent protection plate 14. The liquid crystal display module 11 includes a light output surface 111 (not labeled in FIG. 1). The frame 12 includes a front surface 122 and side rims 123 extending rearwards from a periphery of the front surface 122. The front surface 122 further defines a viewing window. The side rims 123 cooperatively define a receiving cavity 121 behind the front surface 122. After assembly, the frame 12 confines the liquid crystal display module 11 in the receiving cavity 121 of the frame 12. The transparent protection plate 14 is disposed in front of the light output surface 111 of the liquid crystal display module 11. The porous ceramic member 13 is located between the front surface 122 of the frame 12 and the transparent protection plate 14. The transparent protection plate 14 and the light output surface 111 of the liquid crystal display module 11 are spaced apart from one another, and an interspace 15 is defined between the transparent protection plate 14 and the light output surface 111 of the liquid crystal display module 11.

The transparent protection plate 14 is used for protecting the light output surface 111 of the liquid crystal display module 11 from damages by excessive force applied with an object. The transparent protection plate 14 can be made of a material selected from a group consisting of plastic, glass, and any suitable combination thereof.

The porous ceramic member 13 is used to regulate ventilation between the interspace 15 and ambient environment. The porous ceramic member 13 can be made of a material selected from a group consisting of a porous ceramics, a porous oxide-nonoxide composite ceramics, porous glass, porous glass-ceramics, and any suitable combination thereof. Typically, the porous ceramic is preferred to be porous alumina ceramics. The porous alumina ceramics defines a plurality of micro holes, and each hole has a diameter in the range from about 0.1 μm to about 50 μm. A structure of the porous ceramic member 13 can be configured according to a shape of the front surface 122 of the frame 12. In this embodiment, the porous ceramic member 13 includes a first surface (not labeled) interconnecting with the frame 12, and a second surface (not labeled) located at the opposite side of the first surface interconnecting with the transparent protection plate 14, and is substantially a rectangular frame in shape corresponding to the front surface 122 of the frame 12. The first surface and the second surface of the porous ceramic member 13 are substantially parallel to the transparent protection plate 14 and the light output surface 111 of the liquid crystal display module 11 respectively. The porous ceramic member 13, the frame 12, and the transparent protection plate 14 can be fixed together by at least one of a piece of double-sided adhesive tape, a solid adhesive, and glue, or by at least one of a fastening member and a latching member.

Since the porous ceramic member 13 is foam-like and defines many pores interconnecting with each other, the porous ceramic member 13 can regulate ventilation between the interspace 15 and ambient environment while filtering out dust particles. The display device 10 prevents fogs forming on the transparent protection plate 14 and dust particles entering the interspace 15 simultaneously, thus maintaining a clear display. It should be pointed out that the effectiveness of filtering out the dust particles by the porous ceramic member 13 could be improved by decreasing a pore size of the porous ceramic member 13.

Referring to FIG. 3, a display device 20 according to a second embodiment of the present invention is shown. The display device 20 includes a liquid crystal display module 21, a frame 22, a porous ceramic member 23, and a transparent protection plate 24. The display device 20 is similar in principle to the display device 10 described above. However, the frame 22 has a front surface 222 and a flange portion 223 protruding forwardly from an outer edge of the front surface 222. The front surface 222 and the flange portion 223 cooperatively define a first room (not labeled) for receiving the porous ceramic member 23. The porous ceramic member 23 is engaged with the front surface 122 of the frame 22 in shape, and includes a bottom portion 231 and a bent portion 232 that is distal from a center of the display device 20. The bottom portion 231 and the bent portion 232 cooperatively define a second room for receiving the transparent protection plate 24. By using the first room and the second room to receive the porous ceramic member 23 and the transparent protection plate 24 respectively, the porous ceramic member 23 and the transparent protection plate 24 can be firmly fixed on the frame 22.

Referring to FIG. 4, a display device 30 according to a third embodiment of the present invention is shown. The display device 30 includes a liquid crystal display module 31, a frame 32, a porous ceramic member 33, and a transparent protection plate 34. The display device 30 is similar in principle to the display device 10 described above. However, the transparent protection plate 34 defines a plurality of through holes 341 around an edge of the transparent protection plate 34 adjacent the porous ceramic member 33. The through holes 341 are adopted to increase an interaction between ambient environment and the porous ceramic member 33, thereby improving a ventilation effectiveness and ventilation efficiency between ambient environment and an interspace 35 defined between the transparent protection plate 34 and the liquid crystal display module 31. It should be pointed out that the through holes 341 could be filled up with a porous ceramic as well.

Referring to FIG. 5, a display device 40 according to a fourth embodiment of the present invention is shown. The display device 40 includes a liquid crystal display module 41, a frame 42, a porous ceramic member 43, and a transparent protection plate 44. The display device 40 is similar in principle to the display device 10 described above. However, the porous ceramic member 43 is made of porous ceramic units 431, 432. In an illustrated embodiment, each of the porous ceramic units 431, 432 is an elongated rectangular sheet in shape. It can be understood that the porous ceramic member 43 can be made of one of the porous ceramic unit 431, 432, while some other subject are used to replace the rest of the porous ceramic unit 431, 432. Thus, making the display device 40 cost efficient.

It is noted that the scope of the present display devices is not limited to the embodiments described above. For example, in the display device 10, the porous ceramic member 13 can be located between the front surface 122 of the frame 12 and light output surface 111 of the display module 11. In addition, the liquid crystal display module of the display device can be substituted by one of a plasma display module, a field emission display module, and an electroluminescent display module

It is believed that the present embodiments and their advantages will be understood from the foregoing description, and it will be apparent that various changes may be made thereto without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the examples hereinbefore described merely being preferred or exemplary embodiments of the invention. 

1. A display device, comprising: a frame defining a receiving cavity; a display module received in the receiving cavity of the frame; a transparent protection plate configured on a light output side of the display module, the transparent protection plate and a light output surface of the display module being spaced apart from one another so that an interspace is defined between the transparent protection plate and the light output surface; and a porous ceramic member located at an edge between the display module and the transparent protection plate to regulate ventilation between the interspace and outside while filtering out dust particles, wherein the frame comprises a front surface and a flange portion protruding from the front surface, the front surface and the flange portion cooperatively define a room for receiving the porous ceramic member and the transparent protection plate there within.
 2. The display device as claimed in claim 1, wherein the display module is selected from a group consisting of a liquid crystal display module, a plasma display module, a field emission display module, and an electroluminescent display module.
 3. The display device as claimed in claim 1, wherein the transparent protection plate is made of a material selected from a group consisting of plastic, glass, and any combination thereof.
 4. The display device as claimed in claim 1, wherein the porous ceramic member is made of material selected from a group of a porous ceramics, a porous oxide-nonoxide composite ceramics, porous glass, porous glass-ceramics, and any suitable combination thereof.
 5. The display device as claimed in claim 4, wherein the porous ceramic member is made of porous alumina ceramics.
 6. The display device as claimed in claim 5, wherein the porous alumina ceramics defines a plurality of micro holes, and each hole has a diameter in the range from about 0.1 μm to about 50 μm.
 7. The display device as claimed in claim 1, wherein the porous ceramic member comprises a first surface interconnecting with the frame, and a second surface located at the opposite side of the first surface interconnecting with the transparent protection plate.
 8. The display device as claimed in claim 1, wherein the transparent protection plate defines a plurality of through hales in at least one edge thereof corresponding to the porous ceramic member.
 9. The display device as claimed in claim 1, wherein the frame, the transparent protection plate and the porous ceramic member are fixed together by at least one of a piece of double-sided adhesive tape, solid adhesive, and glue, or by at least one of a fastening member and a latching member.
 10. The display device as claimed in claim 1, wherein the porous ceramic member is substantially a rectangular frame in shape.
 11. The display device as claimed in claim 1, wherein the porous ceramic member is made of at least one porous ceramic unit each of the at least one porous ceramic unit is an elongated rectangular sheet in shape.
 12. A display device, comprising: a frame comprising a front surface and a plurality of side rims extending rearwards from a periphery of the front surface, wherein the front surface defines a window, and the side rims cooperatively defines a receiving cavity behind the front surface; a display module having a light output surface confined in the receiving cavity; a transparent protection plate located in front of the display module, the transparent protection plate and a light output surface of the display module being spaced apart from one another so that an interspace is defined between the transparent protection plate and the light output surface; and a porous ceramic member located between the front surface of the frame and the transparent protection plate to regulate ventilation between the interspace and outside while filtering out dust particles, wherein the frame further comprises a flange portion protruding from surface, the front surface and the flange portion cooperatively define a room for receiving the porous ceramic member and the transparent protection plate there within.
 13. The display device as claimed in claim 12, wherein the transparent protection plate is made of a material selected from a group consisting of plastic, glass, and any combination thereof.
 14. The display device as claimed in claim 12, wherein the porous ceramic member is made of a material selected from a group of a porous ceramics, a porous oxide-nonoxide composite ceramics, porous glass, porous glass-ceramics, and any suitable combination thereof.
 15. The display device as claimed in claim 12, wherein the transparent protection plate defines a plurality of through holes in at least one edge thereof corresponding to the porous ceramic member.
 16. The display device as claimed in claim 12, wherein the porous ceramic member is substantially a rectangular frame in shape.
 17. The display device as claimed in claim 12, wherein the porous ceramic member is made of porous alumina ceramics.
 18. The display device as claimed in claim 17, wherein the porous alumina ceramics defines a plurality of micro holes, and each hole has a diameter in the range from about 0.1 μm to about 50 μm. 